See topic "Can't get server to work" at http://forum.shipsim.com/index.php/topic,31383.msg403278.html#msg403278 for instructions ho to properly set-up any public MP server. Think about portforwarding in your internet router, etc.
http://www.mediafire.com/file/s86d5ahjh3r94er/Private_server_or_Manual_connection.pdf
http://www.mediafire.com/download/2r6a4fzces82xj6/Sky-SSE.pdf
Join Ship Simulator Discord at https://discord.gg/KRdwytS4, link will expire in 7 days.